The major growth current through lily pollen tubes enters as K+ and leaves as H+
- 1 January 1976
- journal article
- research article
- Published by Springer Nature in Planta
- Vol. 133 (1) , 1-7
- https://doi.org/10.1007/bf00385998
Abstract
Growing lily (Lilium longiflorum Thunb.) pollen always drive a current into their tubes and out of their grains. The only external ions needed for growth (and the growth current) are K+, H+, and Ca2+. Increases in K+ immediately stimulate the current; while decreases in K+ immediately inhibit it. Comparable changes in H+ have the opposite effect; while those in Ca2+ have very little effect. We infer that most of the steady growth current is carried in by a potassium leak and out by a proton pump; but other considerations indicate that a minor, but controlling, component of the inward current consists of calcium ions.Keywords
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